- Hide menu

Whole Oat Groat Porridge | Breakfast Batch Cooking

LoadingFavoriteAdd to favorites

With their hearty, chewy texture and nutty flavor, oat groats are great for grain bowls, salads, stews, soups, and hot cereal. Oat groats (also known as whole oats) retain the beneficial bran, germ, and endosperm. Just like with any grain, the more processed oats are, the more their flavor and nutrients are compromised. It is always my goal never to compromise when it comes to feeding my body.

vegan gluten-free oat groats cooked in instant pot

Throughout my life, my love affair with oats has shifted. In my twenties, I started with instant oat packages, but it wasn’t long before I wanted to up my nutrients, so I switched to rolled oats. Better, but I wanted MORE nutrients, so I shifted over to steel-cut oats. Even better, but I wanted MORE (am I ever content?!) so, I swapped them out with WHOLE OAT GROATS… Ahhh, now that’s more like it.

I will always toggle between rolled, steel-cut, and whole oat groats. But right now, I am digging these plump, chewy, whole oats that leave me full, satiated (on all levels), and happy. If you wish to take them to yet another nutritional level, sprout them before cooking. I have a post on how to do that (here).  I like to think of food this way: When we go shopping at the grocery store, don’t we usually look for the best deal? We find it worth the extra time to compare prices and quality. The same goes when preparing our food at home. It’s worth the time to extract every last nutrient. At least, that’s my opinion, and I am sticking to it.

vegan gluten-free oat groats cooked in instant pot

T’oat’ally Healthy!

Oat groats have a lot of health benefits, but today, I am going to tap into just two of them: fiber and starch.

Soluble Fiber (beta-glucan)


vegan gluten-free oat groats cooked in instant pot

Techniques and Tips

Oats for Meal Prep

A batch (or two) of oat groats holds well in the fridge for 5-7 days. If you are looking for a way to prepare your breakfast in advance for an easy grab-and-go option, this is it. I have been doing this for quite some time and I LOVE it. The oats will thicken in the fridge, but I add a little boiling water to thin the porridge and warm it for eating. By doing this, you can control the texture that is perfect for you!

vegan gluten-free oat groats cooked in instant potIngredients

Yields 6 cups


Pre-Soak Oat Groats

  1. Rinse the groats and place in a medium-large sized glass bowl. Add enough water to cover by a few inches. Stir in 2 Tbsp of raw apple cider vinegar or lemon juice, cover with a clean dish towel, and leave on the counter overnight.
  2. After soaking, the water now contains the phytates that have been released through soaking, so it is best to drain and rinse the oats prior to cooking.

Instant Pot Method (my favorite)

  1. Place the soaked, rinsed oat groats into the Instant Pot along with the water and kombu seaweed. Secure the lid and make sure the pressure valve is turned to “Sealing.”
    • For a thicker porridge, use 6 cups of water.
    • For a creamier porridge, use 8 cups of water. If you opt for this version, there will be quite a bit of water sitting on top of the cooked oats. Stir it in and let it rest for up to an hour. Stir again, and it will be perfectly creamy.
  2. Pressure the “Manual” button and adjust the cooking time to 14 minutes on high pressure.
  3. Once the machine beeps (indicating that it is done cooking), let the pressure naturally release–this will take roughly 20 minutes.
Stove Top
  1. Bring 6 cups of water to a boil in a pot.
    • Adding the oats after the water is boiling will make for a chunkier, separated, and texturized oatmeal.
    • If you are looking for a more creamy oatmeal, add the oats to the pot with the cold water, then bring to a boil, and down to a simmer.
  2. Add 2 cups of soaked and rinsed oat groats, return to a boil, then reduce the heat to medium-high and cook uncovered until soft, about 30 minutes. Drain off cooking water, then serve.


When it comes to storing hot foods, we have a 2-hour window.  You don’t want to put piping hot foods directly into the refrigerator.  However, If you leave food out to cool, and forget about it you should, after 2 hours, throw it away to prevent the growth of bacteria. (source) Large amounts should be divided into smaller portions and put in shallow covered containers for quicker cooling in a refrigerator that is set to 40 degrees (F) or below.

  1. Fridge – In a sealed container, it will keep for up to 7 days.
  2. Freezer – You can also freeze the porridge in individual or meal-sized portions for up to 3 months.


  1. The porridge will become thicker after cooling down, to the point that you could use a butter knife to cut out your serving. To thin it down a little a bit, add a splash or two or three of plant milk or hot water to the porridge, stirring it well to create a pleasant and creamy porridge—or don’t! You make the call on what texture you want. You are in the captain’s seat on this one.
  2. If pulling the porridge from the freezer, let it thaw in the fridge overnight.

2 thoughts on “Whole Oat Groat Porridge | Breakfast Batch Cooking

  1. Susan Frost says:

    If you are using sprouted whole oat groats, is it necessary to pre-soak, or did the sprouting process take of this step. Any suggestions on how you would alter the instant method if you are starting with sprouted groats? Your close-up photo looks amazing and I’m aiming for that, but haven’t managed it yet!

    • amie-sue says:

      Good morning Susan,

      You can skip the soaking process if you are using sprouted whole oat groats but you will need to alter the recipe and cook time.

      I would start by rinsing the oats first, making sure to let the water drain from them before adding to the pot.
      Use 2 cups groats, 3 cups of water, and kombu seaweed (if using it).

      Cook on “Manual” mode for 40 minutes. Once the machine beeps (indicating that it is done cooking), let the pressure naturally release–this will take roughly 30 minutes. Remove the lid. Fluff the groats and serve as desired.

      I hope this helps. Happy Holidays, amie sue

Leave a Reply

Your email address will not be published. Required fields are marked *